TY - JOUR
T1 - Congruent phase transition at a twist boundary induced by solute segregation
AU - Udler, D.
AU - Seidman, D. N.
PY - 1996
Y1 - 1996
N2 - A congruent or 2D structural phase transition is observed, via Monte Carlo simulations, in a Σ = 5/(002) twist boundary that is induced by segregation of Ni from the bulk of a single-phase Pt(Ni) alloy bicrystal. This segregation induced phase transition, at 850 K, is from the coincident site lattice (CSL) structure to the type 2 structure, which involves a change in the space group from p421∲2′ to p42′2′. For bulk concentrations up to 0.6 at. % Ni the boundary has the CSL structure, while for a bulk concentration of 7 at. % Ni the type 2 structure is stable. Evidence is presented for chemical ordering at this interface.
AB - A congruent or 2D structural phase transition is observed, via Monte Carlo simulations, in a Σ = 5/(002) twist boundary that is induced by segregation of Ni from the bulk of a single-phase Pt(Ni) alloy bicrystal. This segregation induced phase transition, at 850 K, is from the coincident site lattice (CSL) structure to the type 2 structure, which involves a change in the space group from p421∲2′ to p42′2′. For bulk concentrations up to 0.6 at. % Ni the boundary has the CSL structure, while for a bulk concentration of 7 at. % Ni the type 2 structure is stable. Evidence is presented for chemical ordering at this interface.
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U2 - 10.1103/PhysRevLett.77.3379
DO - 10.1103/PhysRevLett.77.3379
M3 - Article
C2 - 10062205
AN - SCOPUS:0000140036
SN - 0031-9007
VL - 77
SP - 3379
EP - 3382
JO - Physical review letters
JF - Physical review letters
IS - 16
ER -